Chinese media reports say an investigation into a bullet train crash in July found that faulty signaling systems and mismanagement were partly to blame, though the accident was triggered by a lightning strike.

The lightning strike caused one bullet train to stall and a sensor failure allowed a second train to keep moving on the same track and slam into it. The Daily News newspaper cited experts warning that the faulty signaling systems are still in use at dozens of stations along high-speed rail lines.

The official Xinhua News Agency and other reports said Friday that China's State Council, or Cabinet, is reviewing the findings from the probe into the disaster, which killed 40 people and prompted checks for the entire bullet train program.